<template>
  <div>
    <!-- 顶部滑动条 -->
    <div id="slider" class="mui-slider">
      <div
        id="sliderSegmentedControl"
        class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <a
            :class="['mui-control-item',item.id == 0 ? 'mui-active': '']"
            v-for="item in cates"
            :key="item.id"
            @click="getPhotoListByCateId(item.id)"
          >{{item.title}}</a>
        </div>
      </div>
    </div>
    <ul>
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' + item.id" tag="li">
        <img v-lazy="item.src" />
        <div class="info">
          <h1 class="info-title">{{item.title}}</h1>
          <div class="info-body">{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>

<script>
import mui from "../lib/mui/js/mui.min.js";

export default {
  data() {
    return {
      cates: [],
      list: []
    };
  },
  created() {
    this.getAllCategory();
    this.getPhotoListByCateId(0);
  },
  mounted() {
    //dom挂载完成后才能拿到最新的，才能初始化控件
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  },
  methods: {
    getAllCategory() {
      this.$axios.get("../json/category.json").then(res => {
        //console.log(res);
        res.data.unshift({ id: 0, title: "全部" });

        this.cates = res.data;
      });
      //console.log(this.cates);
    },
    getPhotoListByCateId(id) {
      //根据分类Id获取图片列表
      this.$axios.get("../json/meinvtupian" + id + ".json").then(res => {
        //console.log(res);
        this.list = res.data;
      });
    }
  }
};
</script>

<style scoped>
* {
  touch-action: pan-y;
}
img[lazy="loading"] {
  width: 40px;
  height: 300px;
  margin: auto;
}
ul {
  list-style: none;
  margin: 0;
  padding: 10px;
}
ul li {
  padding: 5px;
  position: relative;
}
ul li img {
  width: 100%;
  vertical-align: bottom;
}
.info {
  color: white;
  text-align: left;
  position: absolute;
  bottom: 6px;
  background-color: rgba(0, 0, 0, 0.4);
  max-height: 84px;
}
.info .info-title {
  font-size: 14px;
}
.info .info-body {
  font-size: 13px;
}
</style>